A weir built on the Shinano River. The large river to the northwest of this weir is an artificial diversion channel made to control the flooding of the Shinano River. This waterway is called Okozu Bunsui, and it took 54 years to open in 1922. The first weir was also completed in this year, but the current weir was relocated in 2000.
This weir was built on the Shinano River. The large river northwest of this weir is a man-made diversion channel built to control the flooding of the Shinano River. The first weir was also completed in that year, but the current weir was moved in 2000.